Sp. Nayyar et al., SURFACTANT ADSOLUBILIZATION AND MODIFIED ADMICELLAR SORPTION OF NONPOLAR, POLAR, AND IONIZABLE ORGANIC CONTAMINANTS, Environmental science & technology, 28(11), 1994, pp. 1874-1881
Adsolubilization of contaminants by media-sorbed surfactants is an imp
ortant phenomenon for surfactant-based environmental technologies. The
present research evaluates the impacts of contaminant properties on a
dsolubilization (e.g., nonpolar, polar, and ionizable organic compound
s). In addition, adsolubilization by modified admicelles is investigat
ed (operating below the surfactant's Krafft temperature). The medium a
nd surfactant investigated were alumina and sodium dodecyl sulfate, re
spectively. Naphthalene, naphthol, and 4-amino-1-naphthalenesulfonic a
cid were investigated as nonpolar, polar, and ionizable organic compou
nds, respectively. Variations in adsolubilization results for these co
mpounds are explained based on surfactant fundamentals and contaminant
properties. Modified admicelles effectively adsolubilized organic mol
ecules without requiring the presence of surfactant monomers. Implicat
ions of these results to surfactant-based environmental technologies a
re discussed.